# CVE-2026-87818: python-git: GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to read arbit...

CVE-2026-87818 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-87818, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-87818
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 9, 2026

## Description

GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to read arbitrary filesystem paths as repository operands. Attackers can combine --no-index with -I/--ignore-matching-lines to create a content-dependent Boolean oracle, repeatedly querying local files to recover single-line secrets through distinguishable success or error responses.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-GitPython opensuse-leap 16.0 | 3.1.44-160000.4.1 | [OPENSUSE-SU-2026:21874-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21874-1.md) | Sep 18, 2026 |
| Linux | python-GitPython sles 15.6 | 3.1.34.1693646983.2a2ae77-150400.9.11.1 | [SUSE-SU-2026:4191-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4191-1.md) | Sep 15, 2026 |
| Linux | python-GitPython sles 15.7 | 3.1.34.1693646983.2a2ae77-150400.9.11.1 | [SUSE-SU-2026:4191-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4191-1.md) | Sep 15, 2026 |
| Linux | python-git Debian 12.15 (bookworm) | 3.1.30-1+deb12u3 | [DEBIAN-CVE-2026-87818](https://patchblox.com/security/data/fix/linux/debian-cve-2026-87818.md) | Sep 10, 2026 |
| Linux | python-git Debian 13.5 (trixie) | 3.1.44-1+deb13u1 | [DEBIAN-CVE-2026-87818](https://patchblox.com/security/data/fix/linux/debian-cve-2026-87818.md) | Sep 10, 2026 |
| Linux | python-git Debian 14 | 3.1.61-1 | [DEBIAN-CVE-2026-87818](https://patchblox.com/security/data/fix/linux/debian-cve-2026-87818.md) | Sep 10, 2026 |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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